U.S. patent application number 11/525302 was filed with the patent office on 2007-03-22 for multiple use fabric softening composition with reduced fabric staining.
This patent application is currently assigned to The Procter & Gamble Company. Invention is credited to Jacqueline Marie Duderstadt, Steven Robert Sealschott, Johannson Jimmy JR. Tee, Michael Rene Weaver.
Application Number | 20070066510 11/525302 |
Document ID | / |
Family ID | 37889239 |
Filed Date | 2007-03-22 |
United States Patent
Application |
20070066510 |
Kind Code |
A1 |
Tee; Johannson Jimmy JR. ;
et al. |
March 22, 2007 |
Multiple use fabric softening composition with reduced fabric
staining
Abstract
An article comprising a multiple use fabric conditioning
composition that is operably connectable to the inside of a dryer
is useful for softening fabric without staining the fabric.
Inventors: |
Tee; Johannson Jimmy JR.;
(West Chester, OH) ; Duderstadt; Jacqueline Marie;
(Cincinnati, OH) ; Weaver; Michael Rene;
(Cincinnati, OH) ; Sealschott; Steven Robert;
(Cincinnati, OH) |
Correspondence
Address: |
THE PROCTER & GAMBLE COMPANY;INTELLECTUAL PROPERTY DIVISION
WINTON HILL BUSINESS CENTER - BOX 161
6110 CENTER HILL AVENUE
CINCINNATI
OH
45224
US
|
Assignee: |
The Procter & Gamble
Company
Cincinnati
OH
|
Family ID: |
37889239 |
Appl. No.: |
11/525302 |
Filed: |
September 22, 2006 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
60719442 |
Sep 22, 2005 |
|
|
|
Current U.S.
Class: |
510/515 |
Current CPC
Class: |
C11D 17/047 20130101;
C11D 3/32 20130101; C11D 1/62 20130101; C11D 3/001 20130101 |
Class at
Publication: |
510/515 |
International
Class: |
C11D 3/00 20060101
C11D003/00 |
Claims
1. A multiple use, dryer added, article comprising a fabric
softening composition, wherein the fabric softening composition
comprises a fabric softening active and a wax; wherein the fabric
softening active consisting essentially of an ester quaternary
ammonium compound; and wherein the article is operably connectable
to an inside surface of a dryer.
2. The article of claim 1, wherein the ester quaternary ammonium
compound comprises from about 33% to about 62% by weight of the
fabric softening composition.
3. The article of claim 2, wherein the ester quaternary ammonium
compound comprises from about 45% to about 60% by weight of the
fabric softening composition.
4. The article of claim 3, wherein the ester quaternary ammonium
compound comprises from about 49% to about 57% by weight of the
fabric softening composition.
5. The article of claim 4, wherein the wax is chosen from
ethylenebisteramide, ethylenebisoleamide, ethylenebisbehenamide,
and mixtures thereof
6. The article of claim 5 wherein the wax comprises from about 41%
to about 49% by weight of the fabric softening composition.
7. The article of claim 6, where the composition further comprises
from about 1% to about 4% of a perfume, by weight of the fabric
softening composition.
8. The article of claim 7, wherein the article is free of a
perforated membrane.
9. A method of softening fabric comprising the step of contacting
fabric to an article according to claim 1.
10. A kit comprising an article according to claim 1.
Description
CROSS REFERENCE TO RELATED APPLICATION(S)
[0001] This application claims the benefit of U.S. Provisional
Application No. 60/719,442, filed Sep. 22, 2005.
FIELD OF THE INVENTION
[0002] The present invention is directed to multiple use,
dryer-added, fabric softening compositions.
BACKGROUND OF THE INVENTION
[0003] Dryer-added fabric softening products provide a convenient
way for a consumer to provide fabric conditioning benefits to
laundry.
[0004] Generally, there are two main types of dryer-added fabric
softening products, namely, single use products and multiple-use
products. Single use products, most commonly in the sheet form
coated with a fabric softening composition, call for adding a
single sheet into an automatic clothes dryer containing a wet
laundry load, at the beginning of the drying cycle. Examples of
these types of products are disclosed in U.S. Pat. No. 3,442,692
and U.S. Pat. No. 3,686,025.
[0005] Multiple use fabric softening products are placed in the
interior of the dryer to release the fabric conditioning component
to successive laundry loads. Each multiple-use product lasts many
drying cycles and thus provides a better convenience to the
consumer than a single use product. Examples of multiple-use
products include those described in U.S. Pat. No. 3,676,199 and US
2003/0192197 A1.
[0006] A problem facing such multiple use products, particularly
those products having uses over 20, or 30, or more cycles, is the
potential for fabric staining on dark heavy laundry. The addition
of perfume to these products may also exacerbate the problem.
Without wishing to be bound by theory, the fabric staining usually
results earlier in the product's life cycle (e.g., the first cycle)
when the product is less dense opposed to later on when the bar
becomes "cured" having gone through multiple dryer cycles. There is
a need to provide a multiple use fabric softening product that
minimizing fabric staining (particularly in the first cycle), yet
provides effective fabric softening and/or freshening benefits
throughout the course of the product life span (e.g., over 40 or
more cycles).
SUMMARY OF THE INVENTION
[0007] The present invention attempts to solve these and other
problems by providing, in one aspect of the present invention, a
multiple use, dryer added, article comprising a fabric softening
composition, wherein the composition comprises a fabric softening
active, wherein the fabric softening active consists essentially of
an ester quaternary ammonium compound substantially free or free of
any other quaternary ammonium compound, preferably substantially
free or free of any other quaternary ammonium compound.
[0008] Another aspect of the invention provides for a method of
softening a fabric comprising the step of contacting the fabric
with an article of the present invention in an automatic laundry
dryer.
[0009] Another aspect of the invention provides for a kit
comprising a composition of the present invention, wherein the
article is operably connectable to an inside surface of a
dryer.
[0010] Another aspect of the invention provides for a kit
comprising an article according to the present invention.
DETAILED DESCRIPTION OF THE INVENTION
Definitions:
[0011] "Fabric" refers to any textile or fabric material that is
laundered, e.g., garment.
[0012] "Multiple use," means the fabric softening article may be
used to deliver a desired amount of a fabric softening active to
fabric during at least two cycles for drying laundry in an
automatic laundry dryer, preferably at least about 10 cycles, more
preferably at least about 20 cycles, even more preferably at least
about 30 cycles, yet more preferably at least about 40 cycles,
alternatively at least about 50 cycles, alternatively at least
about 60 cycles, before the fabric conditioning composition needs
to be replaced. In one embodiment, the term "multiple use" is not
greater than 200 cycles, alternatively not greater than 100
cycles.
[0013] "Operably connectable to an inside surface of a dryer" is
used herein in the broadest sense to include any means of attaching
the article of the present invention to the inside surface of an
automatic laundry dryer. The inside surface of the dryer may
include the barrel, baffle or inside of the door of the dryer. The
means attaching may include an adhesive that can be used to
releasably affix the composition and composition carrier to the
inside surface of a dryer. Alternatively, the means of attaching
the article may also include a docking member such as one described
in U.S. Pat. Pub. 2003/0192197 A1 published Oct. 16, 2003.
[0014] "Perfume" is used to indicate any odoriferous material. A
wide variety of chemicals are known for perfume uses, including
materials such as aldehydes, ketones, and esters. More commonly,
naturally occurring plant and animal oils and exudates comprising
complex mixtures of various chemical components are known for use
as perfumes. The perfumes herein can be relatively simple in their
compositions or can comprise highly sophisticated complex mixtures
of natural and synthetic chemical components, all chosen to provide
any desired odor. Non-limiting examples of different perfume
compositions are given in US. 2003/0104969 A1; U.S. Pat. No.
5,714,137; U.S. Pat. No. 6,048,830. In one embodiment of the
invention, the composition comprises at least 2.0%, alternatively,
at least about 2.5%, alternatively at least about 3%, alternatively
at least about 4% perfume by weight of the fabric softening
composition.
[0015] "Wax" is used herein in the broadest sense to include any
wax that is suitable for use in an automatic laundry dryer and has
a melting point that can be above about 90.degree. C.,
alternatively above about 95.degree. C., alternatively above about
100.degree. C., or above about 110.degree. C., or above about
120.degree. C. The melting temperature of the wax can be below
200.degree. C., below about 180.degree. C., or below about
170.degree. C. The wax may comprise from about 5% to about 65%,
alternatively about 10% to about 50%, alternatively from about 15%
to about 45%, alternatively from about 41% to about 45%, by weight
of the fabric softening composition. Suitable non-limiting examples
of a wax for purposes of the present invention comprises at least
one of the following: ethylene bisamides, primary alkylamides,
alkanolamides, polyamides, alcohols containing at least 12 carbon
atoms, alkoxylated alcohols containing alkyl chain of at least 12
carbon atoms, carboxylic acids containing at least 12 carbon atoms,
and derivatives thereof. In one embodiment, the wax is chosen from
ethylenebisteramide, ethylenebisoleamide, ethylenebisbehenamide,
and mixtures thereof. In another embodiment, the wax comprises
ethylene bisstearamide. In yet another embodiment, the wax is one
selected from US 2003-0195130 A1 from paragraphs 18-23. Suitable
waxes may be commercially available from Lonza such those under
name of ACRAWAX C. In one embodiment, the fabric softening
composition is a solid at 22.degree. C.
Composition
[0016] One aspect of the present invention provides for a fabric
softening composition comprises a fabric softening active
consisting essentially of an ester quaternary ammonium compound. In
one embodiment, the fabric softening active is substantially free
or free of any other quaternary ammonium compound but for the ester
quaternary ammonium compound. In yet still another embodiment, the
fabric softening active is substantially free or free of any other
actives but for the ester quaternary ammonium compound.
[0017] The present invention is based, in part, upon the surprising
discovery that fabric softening compositions that comprise an ester
quaternary ammonium free of other quaternary ammonium compounds,
such a diamidoamine quaternary ammonium compounds (e.g.,
Varisoft.RTM.) have less fabric staining (if at all) in the dryer,
particularly fabric that is black, as compared to those fabric
softening compositions outside the scope of the present invention.
Examples of quaternary ammonium compounds are described in US
2003/0195130 A1 at paragraphs 14 to 17.
[0018] In one embodiment, the ester quaternary ammonium compound is
one comprising the formula:
{(R.sup.1).sub.4-m--N+--[(CH.sub.2).sub.n--Y--R.sup.2].sub.m}X.sup.-
wherein each R.sup.1 substituent is either hydrogen, a short chain
C.sub.1-C.sub.6, preferably C.sub.1-C.sub.3 alkyl or hydroxyalkyl
group, e.g., methyl (most preferred), ethyl, propyl, hydroxyethyl,
and the like, poly (C.sub.2-3 alkoxy), preferably polyethoxy,
group, benzyl, or mixtures thereof; each m is 2 or 3; each n is
from 1 to about 4, preferably 2; each Y is --O--(O)C--, or
--C(O)--O--, and it is acceptable for each Y to be the same or
different; the sum of carbons in each R.sup.2, plus one when Y is
--O--(O)C--, is C.sub.12-C.sub.22, preferably C.sub.14-C.sub.20,
with each R.sup.2 being a hydrocarbyl, or substituted hydrocarbyl
group; it is acceptable for R.sup.2 to be unsaturated or saturated
and branched or linear and preferably it is linear; it is
acceptable for each R.sup.2 to be the same or different and
preferably these are the same; and X.sup.- can be any
softener-compatible anion, preferably, chloride, bromide,
methylsulfate, ethylsulfate, sulfate, phosphate, and nitrate, more
preferably chloride or methyl sulfate. Preferred ester quaternary
ammonium compounds are typically made by reacting alkanolamines
such as MDEA (methyldiethanolamine) and TEA (triethanolamine) with
fatty acids. Some materials that typically result from such
reactions include N,N-di(acyl-oxyethyl)-N,N-dimethylammonium
chloride or N,N-di(acyl-oxyethyl)-N,N-methylhydroxyethylammonium
methylsulfate wherein the acyl group is derived from animal fats,
unsaturated, and polyunsaturated, fatty acids, e.g., tallow,
hardended tallow, oleic acid, and/or partially hydrogenated fatty
acids, derived from vegetable oils and/or partially hydrogenated
vegetable oils, such as, canola oil, safflower oil, peanut oil,
sunflower oil, corn oil, soybean oil, tall oil, rice bran oil, palm
oil, etc. Non-limiting examples of suitable fatty acids are listed
in U.S. Pat. No. 5,759,990 at column 4, lines 45-66. In another
embodiment, the fabric softening active consists essentially of an
ester quaternary ammonium compound. In yet another embodiment, the
fabric softening active is substantially free or free of any other
active but for the ester quaternary ammonium compound.
[0019] In one embodiment, the fabric softening composition
comprises from about 33% to about 62%, alternatively from about 45%
to about 60%, alternatively from about 49% to about 57%, by weight
of the composition.
Method of Making
[0020] One aspect of the invention provides for making a fabric
softening composition of the present invention providing the steps
of mixing the components of the composition, including the wax
additives of the present invention, at a temperature sufficient to
melt all the components. The step of mixing preferably takes place
at a temperature in excess of about 100.degree. C. In general, the
components should not be mixed at a temperature that is so high
that it harms or discolors the components of the composition. For
many components of the fabric softening composition, the mixing
temperature can be less that about 180.degree. C. Further steps to
make the compositions of the present invention may include those
described in US 2003/0195130 A1, paragraphs 25 to 26.
Kit
[0021] Another aspect of the present invention provides a kit,
wherein the kit comprises a composition of the present invention.
In one embodiment, the kit further comprises instructions
instructing the use to place an article, comprising a composition
of the present invention, to an inside surface of the dryer. In one
embodiment, the kit comprising an article, wherein the article
comprises a composition according to the present invention; but
wherein the article is free of a perforated membrane for exuding
the composition through the perforation on to the surface of the
article. An example of such a "perforated membrane" excluded from
the scope of at least one embodiment of the invention is one
described at U.S. Pat. No. 4,014,432. In another embodiment, the
kit comprises an article, wherein the article comprises a
composition of the present invention and is operably connectable to
an inside surface of a dryer. The kit may optionally comprise
instructions instructing the user to operably connect the article
to the inside surface of the dryer. TABLE-US-00001 Sample 1 Sample
2 Sample 3 Sample 4 Sample 5 KRA.sup.1 49% 50% 57% 33% 57% Acrawax
.TM..sup.2 49% 49% 41% 65% 42% Perfume 2% 1% 2% 2% 1%
.sup.1KRA-Base is
di-(tallowoyloxyethl)-N,N-methylhydroyethylammonium methyl sulfate.
.sup.2Acrawax .TM. is ethylene bister amide available from
Lonza.
[0022] The dimensions and values disclosed herein are not to be
understood as being strictly limited to the exact numerical values
recited. Instead, unless otherwise specified, each such dimension
is intended to mean both the recited value and a functionally
equivalent range surrounding that value. For example, a dimension
disclosed as "40 mm" is intended to mean "about 40 mm".
[0023] All documents cited in the Detailed Description of the
Invention are, in relevant part, incorporated herein by reference;
the citation of any document is not to be construed as an admission
that it is prior art with respect to the present invention. To the
extent that any meaning or definition of a term in this written
document conflicts with any meaning or definition of the term in a
document incorporated by reference, the meaning or definition
assigned to the term in this written document shall govern.
[0024] Except as otherwise noted, the articles "a," "an," and "the"
mean "one or more."
[0025] All percentages stated herein are by weight unless otherwise
specified. It should be understood that every maximum numerical
limitation given throughout this specification will include every
lower numerical limitation, as if such lower numerical limitations
were expressly written herein. Every minimum numerical limitation
given throughout this specification will include every higher
numerical limitation, as if such higher numerical limitations were
expressly written herein. Every numerical range given throughout
this specification will include every narrower numerical range that
falls within such broader numerical range, as if such narrower
numerical ranges were all expressly written herein.
[0026] While particular embodiments of the present invention have
been illustrated and described, it would be obvious to those
skilled in the art that various other changes and modifications can
be made without departing from the spirit and scope of the
invention. It is therefore intended to cover in the appended claims
all such changes and modifications that are within the scope of
this invention.
* * * * *